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V w. S.'SBYMOUR. UNITING SHEETS 0F FIBROUS AND OTHER MATERIALS. No. 289,455.

{Model.)

Patented Dec. 4, 1883;

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of heat. and lock the edges of the sheets, but to bind Nrrn STATES PATENT FFIGE.

VILLIAM S. SEYMOUR, OF CHICAGO, ILLINOIS, ASSIGNOR TO HENRY CLAY BRADLEY, OF SAME PLACE.

UNITING SHEETS OF FIBROUS AND OTHER MATERIALS.

SPECIFICATION forming" part of Letters Patent No. 289,455, dated December 4, 1883.

Application filed March 15, 1883. (ModeL) To all whom it may concern.-

Be it known that I, XVILLIAM S. SEYMOUR, a citizen of the United States, residing in Ohicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Means for Uniting Sheets of Fibrous and other Material, of which the following is a specification.

My invention relates to improvements in means for uniting sheets of fibrous and other material, arranged one above the other, either in tubular formas in coverings for steampipes-or in block form-as in coverings for boilers-or in the form of tablets and books, but which is hereinafter more particularly described as applied to coverings for steam-pipes.

The objects of my invention are principally to dispense with theuse of glue in uniting sheets of paper or board, and more. particularly in coverings for steam pipes and boilers, where it is desirable to unite the opposing edges of the several sheets for the purposes of preventing fraying and disintegration, and yet at the same time leave air-spaces to a greater or less degree over and between as large an area of the sheets as possible, while avoiding the use of paste, glue, or other good conductor A further object is not only to unite and thereby protect the inner and outer walls of the linii'ig next these opposing edges. I attain these objects by devices illustrated in the accompanying drawings, in which- Figure l is a perspective of a section of steam-pipe covering embodying my invention; Fig. 2, a side elevation of the same, partly in section, and showing the binding-strip in its operative position before the tube is divided longitudinally for convenience in uniting it with steam-pipes; and Fig. 3, a plan view of a tablet or book, illustrating the adaptability of my invention to book-binding and other analogous purposes.

Similarletters of reference indicate the same parts in the several figures of the drawings.

A represents a steampipe covering, formed of several sheets of paper by winding them about a mandrel in the usual manner, so as to form a complete cylinder, and, as shown in Fig 2, the surface of the paper so wound is corrugated, and may be indented for the pur pose of forming dead-air spaces or cells, to

better prevent the conduction of heat; but, so

far as my invention is concerned, the irregular surface of the sheets is immaterial, as they may be plain, if desired.

In carrying out my invention I take a strip of fabric of some strong texture-as, for instance, cottonan inch (more or less) wide, as shown at a, and with a suitable instrument or machine, after laying the fabric along the length of the cylinder, punch or force the fabric along its entire width through and transversely of the wall of the cylinder, or it may be through several sheets of paper laid flat-- as, for instance, a book. Punching the strip in this manner doubles the strip upon itself, as shown at b in Fig. 2, and by punching it a short distance beyond the inner wall of a cylinder or under side of the sheets of a book a flap, 0, is formed at each punching, which, turned at a right angle and pasted against the under side sheet, serves to look what may be termed the stitch of the strip. The stitches that is to say, that portion of the strip which .passes through the several sheets-are prefer ably made at intervals of about an inch, and after the first stitch the slack for the succeed ing stitches is taken from the free end of the strip, so that between each stitch that portion of the strip connecting the stitches is drawn smooth, and perhaps taut, and may, if desired, be pasted to the sheets. Pasting either this portion of the stitches or the flaps on the under side is not strictly necessary, owing to the fact that in punching the strip through the sheets are drawn in the same direction, so as to lock the stitch by frictional contact with said edges, as may be seen by a close inspection of Figs. 1 and 2; and as a result the stitch cannot be withdrawn even when more than ordinary force is applied, and, besides, the double extremity of the flap somewhat augments the friction of the strips in this respect, and of course the stitches cannot be pulled in the opposite directionthat is, inwardlyowing to the stitches being formed continuous with that portion of the strip forming the surface-binding. After the strip is stitched the cylinder is split, as shown in Fig. 1, by asuitable instrument along the dotted line shown in Fig. 2, and in this condition the split cylinder or covering may be attached to asteampipe, and in this connection it should be observed that straight edges are thereby provided, which enable a close and tight joining of the edges, which are then secured together by means of staples or other suitable devices.

\Vhile a strip of fabric for forming the stitches and binder is preferred, owing to its non-conductive characteristics-desirable in steam-pipe coveringsiny invention is not limited thereby, for it is obvious that the stitches may be formed of any ductile metal in the form of strips or wire, and so, also, the sheets joined may be of leather, rubber, wood, or any fibrous or other analogous material.

The stitches may be formed by any suitable tool, though I have invented a special tool or machine for this purpose, which will form the subj cot-matter of another application hereafter to be filed.

Having now described my invention, what I claim, and desire to secure by Letters Patent, 1s

1. A means for uniting sheets of fibrous or other materials, the same consisting of a stitching-strip having intervals of its length forced through the sheets in such a manner as to double the stitching-strip upon itself to form the stitch to draw the edges of the fibrous material down so as to lock the stitch by frictional contact with said edges, substantially as described. 7 W

2. A means for uniting sheets of fibrous or other materials, the same consisting of a stitching-strip having intervals of its length forced through the sheets in such a manner as to double the stitching-strip upon itself to form the stitch, said stitch projecting beyond the opposite side of the sheets and forminga flap, afterward bent against the outer face of the bottom sheet, substantially as described.

WILLIAM S. SEYMOUR.

Vitnesscs:

JNo. G. ELLIOTT, XV. XV. ELLIOTT. 

